Lambda Response by Orientation of Striped Patterns

Abstract

A lambda response is an averaged occipital EEG potential associated with the offsets of saccadic eye movements. In the present experiment, two participants were asked to make horizontal saccades across horizontal or vertical white-black stripes. Analysis of orientations of striped patterns showed horizontal saccades across vertical stripes produced larger amplitudes of the lambda response than did horizontal saccades across horizontal stripes. Therefore, when the lambda response is used as the index of mental workload, it is necessary to take notice of the orientation of stimulus pattern.

Probing the dynamics of perisaccadic vision with EEG

“…4, difference plot), which is typically found as soon as 80 ms after saccade offset and is believed to represent the visual potential evoked at re-fixation (Yagi, 1979;Thickbroom, Knezevic, Carroll, & Mastaglia, 1991;Kazai & Yagi, 2003). Additionally, it has been shown that the late lambda components are sensitive to stimulus properties, attentional load and arousal (Yagi, 1981;Marton, Szirtes, & Breuer, 1983;Nagai, Kazai, & Yagi, 2001). In particular, "oddball" stimuli that appear unpredictably or irregularly lead to stronger post-saccadic "detection positivity" (Cooper et al, 1977;Marton et al, 1983;Kamienkowski, Ison, Quiroga, & Sigman, 2012).…”